WO2021179204A1 - Procédé et appareil de réception de données de liaison descendante, procédé et appareil d'envoi de données de liaison descendante, dispositif et support de stockage - Google Patents

Procédé et appareil de réception de données de liaison descendante, procédé et appareil d'envoi de données de liaison descendante, dispositif et support de stockage Download PDF

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Publication number
WO2021179204A1
WO2021179204A1 PCT/CN2020/078796 CN2020078796W WO2021179204A1 WO 2021179204 A1 WO2021179204 A1 WO 2021179204A1 CN 2020078796 W CN2020078796 W CN 2020078796W WO 2021179204 A1 WO2021179204 A1 WO 2021179204A1
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WIPO (PCT)
Prior art keywords
measurement result
sps
serving cell
downlink data
mcs level
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PCT/CN2020/078796
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English (en)
Chinese (zh)
Inventor
李海涛
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202080088543.7A priority Critical patent/CN114830789A/zh
Priority to PCT/CN2020/078796 priority patent/WO2021179204A1/fr
Publication of WO2021179204A1 publication Critical patent/WO2021179204A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • This application relates to the field of communication technology, and in particular to an information processing method, device, equipment, and storage medium.
  • NTN Non Terrestrial Network
  • NR New Radio
  • the propagation delay conference introduces a large scheduling delay, which results in a larger service transmission delay and lower user experience. At the same time, most of the time is spent on scheduling and waiting, resulting in a decrease in resource utilization. Therefore, for delay-sensitive services, the NTN scenario is not suitable for dynamically scheduled transmission scenarios.
  • SPS Semi-Persistent Scheduling
  • Different propagation delays mean that the channel quality varies greatly, and the current Modulation and Coding Scheme (MCS) of SPS resources is statically configured, and only one MCS parameter is configured.
  • MCS Modulation and Coding Scheme
  • the network equipment ensures that the UE is in each position. SPS transmission can be used under all kinds of channel quality, and a lower MCS level has to be adopted, which results in that SPS resources are not fully utilized when the channel quality is better.
  • the embodiments of the application provide a receiving method, sending method, device, equipment, and storage medium of downlink data, which can provide multiple MCS levels for the same SPS, and dynamically select a target MCS from multiple MCSs to perform downlink data Send, improve the utilization of channel quality.
  • the technical solution is as follows:
  • a method for receiving downlink data which is applied to a terminal, and the method includes:
  • a method for sending downlink data is provided, which is applied to a network device, and the method includes:
  • a device for receiving downlink data includes:
  • a device for receiving downlink data includes:
  • An obtaining module used to obtain multiple MCS levels configured for the first SPS
  • the receiving module is configured to use the target MCS level among the multiple MCS levels to decode the received downlink data corresponding to the first SPS.
  • a device for sending downlink data includes:
  • the configuration module is used to configure multiple MCS levels for the first SPS
  • the sending module is configured to use a target MCS level among the multiple MCS levels, and use the target MCS level to encode the downlink data corresponding to the first SPS and send it.
  • a terminal device in another aspect, the device includes a processor and a memory, the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the above-mentioned execution by the terminal device. method.
  • a network device in another aspect, includes a processor and a memory, and the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the above-mentioned execution by the network device. method.
  • a computer-readable storage medium is provided, and instructions are stored on the computer-readable storage medium, and when the instructions are executed by a processor, the foregoing method executed by a terminal device is implemented.
  • a computer-readable storage medium is provided, and instructions are stored on the computer-readable storage medium, and when the instructions are executed by a processor, the foregoing method executed by a network device is implemented.
  • a computer program product containing instructions which when running on a computer, causes the computer to execute the above-mentioned method executed by the terminal device or the above-mentioned method executed by the network device.
  • a more appropriate MCS level can be used under various channel qualities, making full use of Better channel quality, improve the utilization of channel quality.
  • Fig. 1 is a schematic diagram of a communication system provided by an exemplary embodiment of the present application
  • FIG. 2 is a schematic diagram of the communication distance in the NTN system provided by an exemplary embodiment of the present application
  • Fig. 3 is a flowchart of a method for sending/receiving downlink data provided by an exemplary embodiment of the present application
  • FIG. 4 is a flowchart of a method for sending/receiving downlink data provided by another exemplary embodiment of the present application.
  • FIG. 5 is an example diagram of an implementation of SPS transmission provided by an exemplary embodiment of the present application.
  • Fig. 6 is a flowchart of a method for sending/receiving downlink data provided by another exemplary embodiment of the present application.
  • FIG. 7 is a diagram of an implementation example of SPS transmission provided by an exemplary embodiment of the present application.
  • FIG. 8 is a flowchart of a method for sending/receiving downlink data provided by another exemplary embodiment of the present application.
  • FIG. 9 is a diagram of an implementation example of SPS transmission provided by an exemplary embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a downlink data receiving apparatus provided by an exemplary embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a downlink data sending apparatus provided by another exemplary embodiment of the present application.
  • Fig. 12 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • NTN Non-Terrestrial Network
  • Ground NR New Radio
  • satellite communication is not restricted by the user's geographic area. For example, general terrestrial communications cannot cover areas where communications equipment cannot be installed, such as oceans, mountains, and deserts, or areas where communications are not covered due to sparse population.
  • satellite communications since a satellite can cover a larger ground and the satellite can orbit the earth, theoretically every corner of the earth can be covered by satellite communications.
  • satellite communication has greater social value.
  • Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these areas can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed areas and promoting The development of these areas.
  • the satellite communication distance is long, and the communication distance increases and the cost of communication does not increase significantly.
  • the stability of satellite communication is high, and it is not restricted by natural disasters.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • the main researches are LEO satellites and GEO satellites.
  • the LEO satellite altitude ranges from 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours.
  • the signal propagation round-trip delay of single-hop communication between users is generally less than 20ms.
  • the maximum satellite viewing time is 20 minutes.
  • the signal propagation distance is short, the link loss is small, and the requirement for the transmission power of the user terminal is not high.
  • the GEO satellite has an orbital height of 35786km, and its orbital period around the earth is 24 hours.
  • the signal propagation round-trip delay of single-hop communication between users is generally 250ms.
  • satellites In order to ensure satellite coverage and increase the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground.
  • a satellite beam can cover tens to hundreds of kilometers in diameter. Ground area.
  • the downlink is called SPS (Semi-Persistent Scheduling), and the uplink is called CG (Configured Grant).
  • SPS Semi-Persistent Scheduling
  • CG Configured Grant
  • the network For each SPS configuration, the network configures a limited number of downlink HARQ processes for it, and the network uses these downlink HARQ processes in a polling manner to perform downlink transmission on SPS resources.
  • SPS adopts a two-step resource configuration method: First, the network RRC configures the transmission resources and transmission parameters including the period of time domain resources, the number of HARQ processes, etc.; then, the PDCCH scrambled with CS-RNTI is used to activate the SPS-based PDSCH Transmission, and configure other transmission resources and transmission parameters including time domain resources, frequency domain resources, MCS, etc. at the same time.
  • the UE receives the RRC configuration parameters, it cannot immediately use the resources and parameters configured by the configuration parameters for PDSCH reception, but must wait for the corresponding PDCCH to be activated and configure other resources and parameters before PDSCH reception can be performed.
  • the network configures a limited number of HARQ process numbers for it, and the UE uses these uplink HARQ processes in a polling manner to perform uplink transmission on CG resources.
  • NR supports the following two types of uplink unauthorized transmission:
  • the network RRC configures all transmission resources and transmission parameters including time domain resources, frequency domain resources, period of time domain resources, MCS, number of repetitions, frequency hopping, number of HARQ processes, etc. After receiving the RRC configuration, the terminal can immediately use the configured transmission parameters to perform PUSCH transmission on the configured time-frequency resources.
  • a two-step resource configuration method is adopted: first, the network RRC configures the transmission resources and transmission parameters including the period of time domain resources, the number of repetitions, frequency hopping, the number of HARQ processes, etc.; and then the PDCCH scrambled by the CS-RNTI Activate the second type of PUSCH transmission based on configuration authorization, and configure other transmission resources and transmission parameters including time domain resources, frequency domain resources, MCS, etc. at the same time.
  • the UE receives the RRC configuration parameters, it cannot immediately use the resources and parameters configured by the configuration parameters for PUSCH transmission, but must wait for the corresponding PDCCH to be activated and configure other resources and parameters before PUSCH transmission can be performed.
  • the UE If the UE has no data to be sent on the PUSCH resources authorized by the first and second types of configurations, the UE will not send anything on the resources authorized by the configuration.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access, code division multiple access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex system
  • LTE-A Advanced Long Term Evolution
  • NR system NR system evolution system
  • LTE-U LTE-based access to unlicensed spectrum, on unlicensed frequency bands
  • LTE NR-U
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide interoperability for Microwave Access
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity, wireless fidelity
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminals located in the coverage area.
  • the network device 110 may be a satellite in the NTN system, an eNB (Evolutional Node B, evolved base station), or a radio controller in the CRAN (Cloud Radio Access Network, cloud radio access network)
  • the network device may be a mobile switching center, relay station, access point, vehicle-mounted device, wearable device, hub, switch, bridge, router, network side device in a 5G network, or network device in a future communication system, etc.
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as PSTN (Public Switched Telephone Networks), DSL (Digital Subscriber Line), digital cable, direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, WLANs, digital TV networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/or another A device of a terminal configured to receive/send communication signals; and/or IoT (Internet of Things, Internet of Things) equipment.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • D cable Digital cable
  • direct cable connection direct cable connection
  • And/or another data connection/network and/or via a wireless interface, such as for cellular networks, WLANs, digital TV networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/or another A device of a terminal
  • a terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; PCS (Personal Communications System) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with Internet access, web browser, memo pad, calendar, and/or GPS (Global Positioning System) receiver; and conventional laptop and/or palm-type receivers or others including radio telephone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminal, UE (User Equipment), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, user agent or User device.
  • the access terminal can be a cellular phone, a cordless phone, SIP (Session Initiation Protocol) phone, WLL (Wireless Local Loop, wireless local loop) station, PDA (Personal Digital Assistant, personal digital processing), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in the future evolution of PLMN, etc.
  • D2D communication may be performed between the terminal devices 120.
  • the 5G communication system or 5G network may also be referred to as an NR system or NR network.
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network equipment such as a base station, a network controller, and a mobility management entity, which is not limited in the embodiment of the present application.
  • network equipment such as a base station, a network controller, and a mobility management entity, which is not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network devices such as base stations, network controllers, and mobility management entities, which are not limited in the embodiment of the present application.
  • the terminal equipment may also change position. Therefore, for terminal equipment and satellites in different positions, the communication distance changes accordingly. Cause the transmission delay to change.
  • Fig. 2 is a schematic diagram of a communication distance in an NTN system provided by an exemplary embodiment of the present application.
  • the communication distance d between the terminal device and the satellite will also change. As shown in Figure 2 (a), when the terminal device is at position A, the communication distance between the terminal device and the satellite is d0, and when the terminal device moves to position B, the communication distance between the terminal device and the satellite is determined by d0 Becomes d1.
  • the increase in the communication distance d causes a corresponding increase in the communication delay between the satellite and the terminal equipment, that is, the channel quality has undergone a major change.
  • Fig. 3 shows a flowchart of a method for sending/receiving downlink data provided by an exemplary embodiment of the present application.
  • the method is applied to the communication system shown in FIG. 1 or FIG. 2 as an example for illustration.
  • the method includes:
  • Step 302 The network device configures multiple MCS levels for the first SPS
  • the first SPS is the SPS scheduled by the network device to the terminal device.
  • the network equipment uses the configuration signaling to schedule the SPS to the terminal equipment.
  • the configuration signaling is RRC signaling.
  • the RRC signaling carries SPS configuration information.
  • Step 304 The terminal device obtains multiple MCS levels configured for the first SPS
  • the terminal device receives the configuration signaling from the network device, and obtains multiple MCS levels of the first SPS from the configuration signaling.
  • Multiple MCS levels can be understood as at least two MCS levels.
  • Step 306 The network device uses the target MCS level among the multiple MCS levels to encode and send the downlink data corresponding to the first SPS;
  • the target MCS level is one or more MCS levels among a plurality of MCS levels, and the target MCS level is a part of the plurality of MCS levels.
  • the target MCS level is one MCS level among a plurality of MCS levels.
  • the network device determines the target MCS level among multiple MCS levels according to the channel quality, and uses the target MCS level to encode the downlink data corresponding to the first SPS and send it. For example, the network device determines the target MCS level among multiple MCS levels according to the link adaptation algorithm, and uses the target MCS level to encode the downlink data corresponding to the first SPS and send it.
  • Step 308 The terminal device uses the target MCS level among the multiple MCS levels to decode the received downlink data corresponding to the first SPS.
  • the terminal device determines the target MCS level among multiple MCS levels, and uses the target MCS level to decode the received downlink data corresponding to the first SPS.
  • the target MCS level used by the network equipment may be referred to as the first target MCS level; the target MCS level used by the terminal equipment may be referred to as the second target MCS level.
  • the first target MCS level is the same as or different from the second target MCS level.
  • the method provided in this embodiment configures multiple MCS levels for the first SPS, and uses the target MCS levels among the multiple MCS levels to encode and decode the downlink data corresponding to the first SPS.
  • a more suitable MCS level can be used in the next step to make full use of better channel quality and improve the utilization rate of channel quality.
  • Method 1 The network device configures multiple MCS levels for the first SPS, and the terminal device sequentially uses the multiple MCS configured for the first SPS to receive the physical downlink shared channel (Physics Downlink Share Channel, PDSCH).
  • PDSCH Physical Downlink Share Channel
  • Method 2 The network device configures multiple MCS levels for the first SPS, and the corresponding relationship between each MCS level and the multiple serving cell measurement result quantization intervals.
  • the terminal device decides which MCS level to use according to the currently measured serving cell measurement results Perform PDSCH reception.
  • Method 3 The network device configures multiple MCS levels for the first SPS, and indicates the use method of multiple MCS levels at the same time.
  • the terminal device determines which MCS level to use or preferentially use for PDSCH reception according to the use method of multiple MCS levels indicated by the network device .
  • Fig. 4 shows a flowchart of a method for sending/receiving downlink data provided by an exemplary embodiment of the present application.
  • the method is applied to the communication system shown in FIG. 1 or FIG. 2 as an example for illustration.
  • the method includes:
  • Step 402 The network device configures multiple MCS levels for the first SPS
  • the network device sends configuration signaling to the terminal device, where the configuration signaling is used to configure multiple MCS levels for the first SPS.
  • the network device sends RRC configuration signaling to the terminal device, and the RRC configuration signaling is used to configure multiple MCS levels for the first SPS.
  • the RRC configuration signaling carries SPS-Config configuration information.
  • the RRC configuration signaling includes: Configured Scheduling-Radio Network Temporary Identity (CS-RNTI), the resource period of the first SPS, the number of downlink HARQ processes reserved by the first SPS, and is used for the first
  • CS-RNTI Configured Scheduling-Radio Network Temporary Identity
  • HARQ Hybrid Automatic Repeat reQuest
  • the network device sends a PDCCH indication for activating SPS to the terminal device, where the PDCCH indication carries multiple MCS levels.
  • the network device activates the configuration resource of the first SPS through the PDCCH, and the configuration resource of the first SPS includes:
  • the network device indicates a value of k1, where the k1 is the time slot interval between the UE receiving the PDSCH and the UE sending the ACK/NACK feedback for the PDSCH reception.
  • Step 404 The terminal device obtains multiple MCS levels configured for the first SPS
  • the terminal device receives the RRC configuration signaling sent by the network device, and obtains the configuration resource of the first SPS from the RRC configuration signaling.
  • the terminal device also receives the activation instruction sent by the network device through the PDCCH, and activates the configuration resource of the first SPS according to the activation instruction.
  • Step 406 The network device uses the target MCS level among the multiple MCS levels to encode and send the downlink data corresponding to the first SPS;
  • the network device selects a target MCS level from the N MCS levels configured for the first SPS based on the link adaptation algorithm (MCS selection algorithm) Send after encoding the downlink data.
  • MCS selection algorithm link adaptation algorithm
  • the network device may be based on the CSI reported by the terminal device last time, or based on the target MCS level used by the network device for PDSCH transmission of the terminal device for the last (last) time, and the ACK/NACK feedback information of the terminal device for PDSCH transmission. Determine the target MCS level used for the SPS transmission this time.
  • the realization of the link adaptation algorithm depends on the self-realization of the network equipment of different operators, which is not limited here.
  • Step 408 The terminal device sequentially determines the target MCS level from the multiple MCS levels in sequence, and decodes the received downlink data corresponding to the first SPS until the decoding is successful.
  • the terminal device preferentially selects the first MCS level used for downlink data transmission corresponding to the second SPS as the target MCS level, and decodes the received downlink data corresponding to the first SPS.
  • the terminal device selects the MCS level with the smallest difference from the first MCS level among the remaining MCS levels among the multiple MCS levels, and decodes the received downlink data corresponding to the first SPS until the decoding success.
  • the second SPS is the most recent SPS before the first SPS. That is, the second SPS is the last SPS scheduled to the terminal device by the network device in a semi-persistent scheduling manner before the first SPS.
  • the terminal device preferentially selects the first MCS level used in the most recent downlink data transmission as the target MCS level, and decodes the downlink data corresponding to the received first SPS; in the case of decoding failure
  • the terminal device selects the MCS level with the smallest difference from the first MCS level among the remaining MCS levels among the multiple MCS levels, and decodes the received downlink data corresponding to the first SPS until the decoding is successful.
  • the most recent downlink data transmission includes: the last SPS scheduled by the network device to the terminal device in a dynamic scheduling mode before the first SPS, or the last SPS scheduled to the terminal device by the network device in a semi-static scheduling mode before the first SPS Last SPS.
  • the foregoing sequence is a sequence determined by the terminal device itself, that is, the foregoing sequence depends on the UE implementation.
  • the network device configures three MCSs for the first SPS, MCS 1>MCS 2>MCS 3.
  • the UE uses MCS1, MCS2, and MCS3 for PDSCH decoding in turn, and finally uses MCS3 to decode successfully;
  • the UE uses MCS3 (last used) for decoding PDSCH decoding, if the decoding fails, continue to use MCS2 for PDSCH decoding, and finally use MCS2 to decode successfully;
  • the UE first uses MCS2 (last used) for PDSCH decoding, and finally uses MCS2 to decode successfully;
  • the UE uses MCS2 (last used) for PDSCH decoding.
  • the UE If the decoding fails, continue to use MCS1 for PDSCH decoding, and finally use MCS1 to decode successfully; in the fifth transmission of the first SPS In, the UE first uses MCS1 (last used) for PDSCH decoding, and finally uses MCS1 to decode successfully.
  • the method provided in this embodiment configures multiple MCS levels for the first SPS, and uses the target MCS levels among the multiple MCS levels to encode and decode the downlink data corresponding to the first SPS.
  • a more suitable MCS level can be used in the next step to make full use of better channel quality and improve the utilization rate of channel quality.
  • the terminal uses the target MCS level of the multiple MCS levels according to the sequence, which reduces the amount of information that the network device needs to configure to the terminal device and saves air interface resources.
  • Fig. 6 shows a flowchart of a method for sending/receiving downlink data provided by an exemplary embodiment of the present application.
  • the method is applied to the communication system shown in FIG. 1 or FIG. 2 as an example for illustration.
  • the method includes:
  • Step 602 The network device configures multiple MCS levels for the first SPS and corresponding relationships
  • the correspondence relationship includes the correspondence relationship between multiple MCS levels and the quantization interval of the measurement result of the serving cell.
  • the correspondence relationship is implicitly represented by using at least one serving cell measurement result threshold.
  • the network device sends configuration signaling to the terminal device, where the configuration signaling is used to configure multiple MCS levels for the first SPS.
  • the configuration signaling is used to configure at least one serving cell measurement result threshold, at least one serving cell measurement result threshold is used to determine N serving cell measurement result intervals, and to establish N serving cell measurement result intervals and N MCS Correspondence between levels.
  • the network device sends RRC configuration signaling to the terminal device, and the RRC configuration signaling is used to configure multiple MCS levels for the first SPS.
  • the RRC configuration signaling carries SPS-Config configuration information.
  • the RRC configuration signaling includes: CS-RNTI, the resource period of the first SPS, the number of downlink HARQ processes reserved by the first SPS, the PUCCH frequency domain resources used for HARQ feedback for the first SPS, and N of the first SPS At least one of MCS level and correspondence. Wherein, N is an integer greater than 1. That is, multiple MCS levels and corresponding relationships are configured through RRC (included in the SPS configuration).
  • the network device sends a PDCCH indication for activating SPS to the terminal device, where the PDCCH indication carries multiple MCS levels and corresponding relationships.
  • the network device activates the configuration resource of the first SPS through the PDCCH, and the configuration resource of the first SPS includes:
  • the network device indicates a value of k1, where the k1 is the time slot interval between the UE receiving the PDSCH and the UE sending the ACK/NACK feedback for the PDSCH reception.
  • At least one serving cell measurement result threshold is used to determine the quantization interval of at least one serving cell measurement result, and the quantification interval of each serving cell measurement result corresponds to an MCS level.
  • the number of measurement result thresholds for at least 1 serving cell can be:
  • Serving cell measurement results include but are not limited to any of the following measurement types:
  • the TA value of itself and the network measured by the UE The TA value of itself and the network measured by the UE;
  • the RTT of the signal transmission between the UE and the network measured by the UE
  • the UE measures the distance between itself and the satellite base station.
  • Step 604 The terminal device obtains multiple MCS levels configured for the first SPS and corresponding relationships;
  • the terminal device receives the RRC configuration signaling sent by the network device, and obtains the configuration resource and the corresponding relationship of the first SPS from the RRC configuration signaling.
  • the terminal device also receives the activation instruction sent by the network device through the PDCCH, and activates the configuration resource of the first SPS according to the activation instruction.
  • the terminal device receives the configured measurement result threshold of at least one serving cell; determines N serving cell measurement result intervals according to the at least one serving cell measurement result threshold, and establishes a correspondence relationship between the N serving cell measurement result intervals and the N MCS levels.
  • the measurement result threshold of at least one serving cell includes: the measurement result threshold of N serving cells.
  • the terminal device determines the interval between the measurement result threshold of the i-th serving cell and the measurement result threshold of the i+1-th serving cell as the i-th service.
  • the measurement result intervals of the N serving cells are:
  • measure_th i ⁇ measure_result ⁇ measure_th i+1,0 ⁇ i ⁇ N
  • the measurement result threshold of at least one serving cell includes: N-1 serving cell measurement result threshold; when i is equal to 1, the terminal equipment will be less than the interval of the first serving cell measurement result threshold , Determined as the first serving cell measurement result interval; in the case that i is a positive integer greater than 1 and less than N-1, it will be greater than or equal to the i-th serving cell measurement result threshold, and less than the i+1-th serving
  • the interval between the cell measurement result thresholds is determined as the i-th serving cell measurement result interval; when i is a positive integer equal to N-1, the interval greater than or equal to the i-th serving cell measurement result threshold is determined It is the measurement result interval of the Nth serving cell.
  • the N serving cell measurement result intervals are respectively:
  • measure_th i ⁇ measure_result ⁇ measure_th i+1,1 ⁇ i ⁇ N-1
  • the terminal device determines the correspondence between the N serving cell measurement result intervals and the N MCS levels.
  • the measurement result thresholds of the N serving cells correspond to the N MCS levels in a one-to-one correspondence, and the corresponding relationship between the measurement result intervals of the N serving cells and the N MCS levels is implicitly determined.
  • the type of measurement such as:
  • the lower TA value corresponds to the higher the MCS level
  • Step 606 The network device uses the target MCS level among the multiple MCS levels to encode and send the downlink data corresponding to the first SPS;
  • the network device selects a target MCS level from the N MCS levels configured for the first SPS based on the link adaptation algorithm (MCS selection algorithm) Send after encoding the downlink data.
  • MCS selection algorithm link adaptation algorithm
  • the network device may be based on the CSI reported by the terminal device last time, or based on the target MCS level used by the network device for PDSCH transmission of the terminal device for the last (last) time, and the ACK/NACK feedback information of the terminal device for PDSCH transmission. Determine the target MCS level used for the SPS transmission this time.
  • the realization of the link adaptation algorithm depends on the self-realization of the network equipment of different operators, which is not limited here.
  • Step 608 The terminal device determines the target MCS level among multiple MCS levels according to the corresponding relationship
  • the UE If the measurement result of the UE's current serving cell is measure_result ⁇ measure_th 1, the UE skips this time to receive the PDSCH of the SPS.
  • the UE selects the MCS corresponding to the interval where the measurement result of the current serving cell is located.
  • the UE selects the MCS corresponding to the interval where the measurement result of the current serving cell is located.
  • Step 610 The terminal device uses or preferentially uses the target MCS level to decode the received downlink data corresponding to the first SPS.
  • the network device configures 3 MCS levels for the first SPS, MCS1>MCS2>MCS3, and also configures 2 TA thresholds, and determines 3 TA intervals according to the 2 TA thresholds.
  • at the third SPS transmission At time T3, select MCS2 according to the TA corresponding to time T3 to decode the PDSCH;
  • the fourth SPS transmission time T4 select MCS2 according to the TA corresponding to time T4 to decode the PDSCH;
  • at the fifth SPS transmission time T5 The corresponding TA selects MCS1 to decode the PDSCH.
  • the network device configures multiple MCS levels for the first SPS and the corresponding relationship; the terminal device can determine a more reasonable target MCS level according to the corresponding relationship, and use or preferentially use the target MCS
  • the level decodes the downlink data corresponding to the received first SPS; not only can the more appropriate MCS level be used under various channel qualities, the better channel quality can be fully utilized, and the utilization rate of the channel quality can be improved; it can also be used
  • the selection of the target MCS level is completed with a small amount of calculation, and the calculation efficiency of the terminal is improved.
  • Fig. 8 shows a flowchart of a method for sending/receiving downlink data provided by an exemplary embodiment of the present application.
  • the method is applied to the communication system shown in FIG. 1 or FIG. 2 as an example for illustration.
  • the method includes:
  • Step 802 The network device configures multiple MCS levels for the first SPS, and configures a method for using multiple MCS levels;
  • the order of use refers to the order of use of MCS predicted according to the SPS transmission timing.
  • the network device sends configuration signaling to the terminal device, where the configuration signaling is used to configure multiple MCS levels for the first SPS.
  • the configuration signaling is used to configure at least one serving cell measurement result threshold, at least one serving cell measurement result threshold is used to determine N serving cell measurement result intervals, and to establish N serving cell measurement result intervals and N MCS Correspondence between levels.
  • the network device sends RRC configuration signaling to the terminal device, and the RRC configuration signaling is used to configure multiple MCS levels for the first SPS.
  • the RRC configuration signaling carries SPS-Config configuration information.
  • the RRC configuration signaling includes: CS-RNTI, the resource period of the first SPS, the number of downlink HARQ processes reserved by the first SPS, the PUCCH frequency domain resources used for HARQ feedback for the first SPS, and N of the first SPS At least one of MCS grades and multiple MCS grades usage methods. Wherein, N is an integer greater than 1. That is, multiple MCS levels and usage methods are configured through RRC (included in the SPS configuration).
  • the network device sends a PDCCH indication for activating SPS to the terminal device, where the PDCCH indication carries multiple MCS levels and usage methods.
  • the network device activates the configuration resource of the first SPS through the PDCCH, and the configuration resource of the first SPS includes:
  • the network device indicates a value of k1, where the k1 is the time slot interval between the UE receiving the PDSCH and the UE sending the ACK/NACK feedback for the PDSCH reception.
  • the network device indicates the method of using the N MCS levels based on the prediction of the UE channel condition change.
  • the usage mode of the N MCS levels is determined by the network according to the movement law of the satellite and the UE.
  • the specific usage can be:
  • the use order of the N MCS levels predicted on the SPS transmission timing, and the consecutive number of times each MCS level is used.
  • the network device further sends a first indication, which is used to indicate to the terminal device whether to use other candidate MCSs in the multiple MCS levels for decoding in the case that decoding using the target MCS level fails.
  • the target MCS level refers to an MCS level determined based on multiple MCS levels.
  • the network device can also instruct the UE whether the terminal needs other MCS levels that can be used for SPS to perform PDSCH decoding in the case that the UE fails to decode the SPS transmission using the MCS predicted by the network device.
  • Step 804 The terminal device obtains multiple MCS levels configured for the first SPS and a method of using the multiple MCS levels;
  • the terminal device receives the RRC configuration signaling sent by the network device, and obtains the configuration resource of the first SPS from the RRC configuration signaling and the method of using multiple MCS levels.
  • the terminal device also receives the activation instruction sent by the network device through the PDCCH, and activates the configuration resource of the first SPS according to the activation instruction.
  • the method of using multiple MCS levels includes:
  • the order of use refers to the order of use of MCS predicted according to the SPS transmission timing.
  • the terminal device further receives a first indication, the first indication being used to instruct the terminal to use other candidate MCSs of the multiple MCS levels for decoding in a case where decoding using the target MCS level fails
  • Step 806 The network device uses the target MCS level among the multiple MCS levels to encode the downlink data corresponding to the first SPS and send it;
  • the network device selects a target MCS level from the N MCS levels configured for the first SPS based on the link adaptation algorithm (MCS selection algorithm) , Encode and send the downlink data corresponding to the first SPS.
  • MCS selection algorithm link adaptation algorithm
  • the network device may be based on the CSI reported by the terminal device last time, or based on the target MCS level used by the network device for PDSCH transmission of the terminal device for the last (last) time, and the ACK/NACK feedback information of the terminal device for PDSCH transmission. Determine the target MCS level used for the SPS transmission this time.
  • the realization of the link adaptation algorithm depends on the self-realization of the network equipment of different operators, which is not limited here.
  • Step 808 The terminal device determines the target MCS level among the multiple MCS levels according to the use method of the multiple MCS levels;
  • the terminal device calculates the target MCS level at the time of this SPS transmission according to the order in which multiple MCS levels are used and the continuous time each MCS level is used separately.
  • the i-th MCS level is determined as this The target MCS level at the second SPS transmission opportunity.
  • the terminal device calculates the target MCS level at the time of this SPS transmission according to the order in which multiple MCS levels are used and the number of consecutive uses of each MCS level.
  • the i-th MCS level is determined as this The target MCS level at the second SPS transmission opportunity.
  • Step 810 The terminal device uses or preferentially uses the target MCS level to decode the received downlink data corresponding to the first SPS.
  • the network device configures three MCS levels for the first SPS, MCS1>MCS2>MCS3, and the configuration and use method is: use in the order of MCS1, MCS2, MCS3, and use each MCS level twice.
  • MCS1 is used for PDSCH decoding
  • MCS2 is used for PDSCH decoding
  • MCS3 is used for PDSCH decoding.
  • the method provided in this embodiment uses the network device to configure multiple MCS levels for the first SPS, and how to use them; the terminal device can determine a more reasonable target MCS level based on the use methods of multiple MCS levels. , Use or preferentially use the target MCS level to decode the downlink data corresponding to the received first SPS; not only can the more appropriate MCS level be used under various channel qualities, the better channel quality can be fully utilized, and the channel quality can be improved. Utilization rate: It can also use less calculation to complete the selection of the target MCS level, which improves the computing efficiency of the terminal.
  • the steps performed by the terminal device in the above embodiments can be individually implemented as a downlink data receiving method on the terminal device side; the steps performed by the network device in the above embodiments can be individually implemented as a downlink data sending method on the network device side .
  • Fig. 10 shows a block diagram of a device for receiving downlink data provided by an exemplary embodiment of the present application.
  • the device can be implemented as all or a part of the terminal device, or the device can be set in the terminal device, and the device includes:
  • the obtaining module 1020 is used to obtain multiple MCS levels configured for the first-degree SPS;
  • the receiving module 1040 is configured to use the target MCS level among the multiple MCS levels to decode the received downlink data corresponding to the first SPS.
  • the receiving module 1040 is configured to sequentially determine the target MCS level from the multiple MCS levels in sequence, and decode the received downlink data corresponding to the first SPS Until the decoding is successful.
  • the receiving module 1040 is configured to preferentially select the first MCS level used for downlink data transmission corresponding to the second SPS as the target MCS level, and compare the received first MCS level as the target MCS level.
  • the downlink data corresponding to the SPS is decoded; in the case of decoding failure, the MCS level with the smallest difference from the first MCS level among the remaining MCS levels among the plurality of MCS levels is selected, and the received first MCS level is selected.
  • the downlink data corresponding to an SPS is decoded until the decoding is successful;
  • the second SPS is the most recent SPS before the first SPS. That is, the second SPS is the last SPS scheduled to the terminal device by the network device in a semi-persistent scheduling manner before the first SPS.
  • the receiving module 1040 is configured to preferentially select the first MCS level used in the most recent downlink data transmission, as the target MCS level, for the received first SPS
  • the downlink data is decoded; in the case of a decoding failure, the MCS level with the smallest difference from the first MCS level among the remaining MCS levels among the plurality of MCS levels is selected to correspond to the received first SPS Decode the downlink data until the decoding is successful;
  • the most recent downlink data transmission includes: the most recent dynamically scheduled downlink data transmission before the first SPS, or the most recent semi-persistent scheduled downlink data transmission.
  • the most recent downlink data transmission includes: the last SPS scheduled by the network device to the terminal device in a dynamic scheduling manner before the first SPS, or the network device uses semi-persistent scheduling before the first SPS The last SPS scheduled to the terminal device in this way.
  • the sequence is a sequence determined by the terminal itself.
  • the device further includes:
  • the obtaining module 1020 is configured to obtain a corresponding relationship, the corresponding relationship including the corresponding relationship between the multiple MCS levels and the quantization interval of the serving cell measurement result;
  • the receiving module 1040 is configured to determine the target MCS level among the multiple MCS levels according to the corresponding relationship, and use or preferentially use the target MCS level for the downlink corresponding to the received first SPS The data is decoded.
  • the serving cell measurement result includes at least one of the following:
  • the time advance TA value between itself and the network measured by the terminal device is the time advance TA value between itself and the network measured by the terminal device
  • the transmission round trip delay RTT of the signal transmission between itself and the network measured by the terminal device is the transmission round trip delay RTT of the signal transmission between itself and the network measured by the terminal device
  • the distance between the terminal device and the satellite base station measured by the terminal device.
  • the device further includes: an establishment module;
  • the receiving module 1040 is configured to receive the configured measurement result threshold of at least one serving cell
  • the establishment module is configured to determine N serving cell measurement result intervals according to the at least one serving cell measurement result threshold, and establish a correspondence between the N serving cell measurement result intervals and N MCS levels.
  • the at least one serving cell measurement result threshold includes: N serving cell measurement result thresholds;
  • the establishment module is used to determine the interval between the measurement result threshold of the i-th serving cell and the measurement result threshold of the i+1-th serving cell when i is a positive integer less than N. Is the i-th serving cell measurement result interval; if i is a positive integer equal to N, the interval greater than or equal to the i-th serving cell measurement result threshold is determined as the N-th serving cell measurement result interval.
  • the at least one serving cell measurement result threshold includes: N-1 serving cell measurement result thresholds;
  • the establishment module is configured to determine an interval less than the first serving cell measurement result threshold as the first serving cell measurement result interval when i is equal to 1, and where i is greater than 1 and less than N-1
  • the interval between the measurement result threshold of the i-th serving cell and the interval between the measurement result threshold of the i+1th serving cell and the i-th serving cell is determined as the i-th serving cell measurement result interval;
  • the interval greater than or equal to the measurement result threshold of the i-th serving cell is determined as the measurement result interval of the N-th serving cell.
  • the obtaining module 1020 is further configured to obtain the use methods of the multiple MCS levels;
  • the receiving module 1040 is further configured to determine the target MCS level among the plurality of MCS levels according to the use method of the plurality of MCS levels, and use or preferentially use the target MCS level to the received
  • the downlink data corresponding to the first SPS is decoded.
  • the method for using the multiple MCS levels includes:
  • the receiving module 1040 is further configured to use other candidate MCSs of the multiple MCS levels for decoding in the case that decoding using the target MCS level fails.
  • the receiving module 1040 is further configured to receive a first indication, and the first indication is used to instruct the terminal to use the target MCS level when decoding fails. Other candidate MCSs in multiple MCS levels are decoded.
  • Fig. 11 shows a block diagram of an apparatus for sending downlink data provided by an exemplary embodiment of the present application.
  • the device can be implemented as all or a part of the network equipment, or the device can be set in a terminal device, and the device includes:
  • the configuration module 1120 is used to configure multiple MCS levels for the first SPS
  • the sending module 1140 is configured to use a target MCS level among the multiple MCS levels, and use the target MCS level to encode the downlink data corresponding to the first SPS and send it.
  • the sending module 1140 is configured to determine a target MCS level among the multiple MCS levels based on a link adaptation algorithm.
  • the configuration module 1120 is further configured to configure a corresponding relationship to the terminal, and the corresponding relationship includes the corresponding relationship between the multiple MCS levels and the quantization interval of the serving cell measurement result .
  • the serving cell measurement result includes at least one of the following:
  • the time advance TA value between itself and the network measured by the terminal device is the time advance TA value between itself and the network measured by the terminal device
  • the round-trip transmission time RTT of the signal transmission between itself and the network measured by the terminal device is the round-trip transmission time RTT of the signal transmission between itself and the network measured by the terminal device
  • the distance between the terminal device and the satellite base station measured by the terminal device.
  • the configuration module 1120 is further configured to configure at least one serving cell measurement result threshold to the terminal, and the at least one serving cell measurement result threshold is used to determine N serving cell measurement result intervals , And establish the correspondence between the N serving cell measurement result intervals and the N MCS levels.
  • the measurement result threshold of the at least one serving cell includes:
  • the configuration module 1120 is further configured to configure the use method of the multiple MCS levels to the terminal.
  • the method for using the multiple MCS levels includes:
  • the configuration module 1120 is further configured to configure a first indication to the terminal, and the first indication is used to instruct the terminal to decode when the target MCS level fails to be decoded. , Using other candidate MCSs in the multiple MCS levels for decoding.
  • FIG. 12 shows a schematic structural diagram of a communication device (terminal device or network device) provided by an exemplary embodiment of the present application.
  • the communication device includes a processor 1201, a receiver 1202, a transmitter 1203, a memory 1204, and a bus 1205.
  • the processor 1201 includes one or more processing cores, and the processor 1201 executes various functional applications and information processing by running software programs and modules.
  • the receiver 1202 and the transmitter 1203 may be implemented as a communication component, and the communication component may be a communication chip.
  • the memory 1204 is connected to the processor 1201 through a bus 1205.
  • the memory 1204 may be used to store at least one instruction, and the processor 1201 is used to execute the at least one instruction, so as to implement each step performed by the terminal device and the network device in the foregoing method embodiments.
  • the memory 1204 may be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes, but is not limited to: magnetic disks or optical disks, EEPROM (Electrically Erasable Programmable read only memory, electrically erasable programmable read-only memory), EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory), SRAM (Static Random Access Memory, static anytime access memory), ROM (Read Only Memory, read only memory), magnetic memory, flash memory, PROM (Programmable Read-Only Memory, programmable read only memory).
  • the present application provides a computer-readable storage medium in which at least one instruction is stored, and the at least one instruction is loaded and executed by the processor to realize the sending/sending of downlink data provided by each of the foregoing method embodiments.
  • Receiving method
  • the present application also provides a computer program product, which when the computer program product runs on an electronic device, causes the electronic device to execute the downlink data sending/receiving method provided by the foregoing method embodiments.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention relève du domaine technique des communications et concerne un procédé et un appareil de réception/envoi de données de liaison descendante, ainsi qu'un dispositif et un support de stockage. Le procédé comprend les étapes au cours desquelles : un dispositif de réseau configure de multiples niveaux de MCS pour une première SPS puis, au moyen d'un niveau de MCS cible parmi les multiples niveaux de MCS, code des données de liaison descendante correspondant à la première SPS et les envoie ; un dispositif terminal obtient les multiples niveaux de MCS configurés pour la première SPS puis, au moyen du niveau de MCS cible parmi les multiples niveaux de MCS, décode les données de liaison descendante reçues correspondant à la première SPS. La présente invention permet d'augmenter le taux d'utilisation en fonction d'une qualité de canal.
PCT/CN2020/078796 2020-03-11 2020-03-11 Procédé et appareil de réception de données de liaison descendante, procédé et appareil d'envoi de données de liaison descendante, dispositif et support de stockage WO2021179204A1 (fr)

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PCT/CN2020/078796 WO2021179204A1 (fr) 2020-03-11 2020-03-11 Procédé et appareil de réception de données de liaison descendante, procédé et appareil d'envoi de données de liaison descendante, dispositif et support de stockage

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